Hello I made a pcb layout that contains arduino mega, and when exporting it to 1:1 pdf, I changed the footprint of arduino with another but same result, I noticed that the footprint of arduino mega is smaller than real arduino mega that I have, same thing when exporting in svg. Strangely, when exporting the pcb as image, the foortprint seems to be correct ! I exported the gerber, and I searched for gerber viewer on internet. The first gerber viewer that I used showed me that also arduino footprint is wrong, while the second site showed me that it is correct! I am totally confused now! I ended with using gerber viewer of Easyeda itself, but I found that it shows the file without keeping 1:1 dimensions. now I want to know, if I print this gerber it will gove me correct pcb or I will lost my money?